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Re: John's sync-adjust circuit
Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <FutureT-at-aol-dot-com>
In a message dated 2/1/01 1:48:15 PM Eastern Standard Time, tesla-at-pupman-dot-com
> I was getting 45degrees instead of the 20 - 30degrees I reported. I
> saw the 45deg and it registered in my head as less. I rechecked it
> this morning to make sure. So I guess it is working correctly?
Yes, it seems to be working perfectly.
> >I am very surprised that such a small amount of capacitance did the
> >job. For a 1/8th HP motor, I would have expected that about 60uF
> >would have been needed. Does the motor remain locked for the full
> >range of the series variac? Or do you have to keep the variac within
> >a certain range? Is this about a 7.5A variac or so?
> Yes it stays in sync the whole time. I can watch the electrodes move
> when turning the variac using the strobe light. They stay steady when
> I stop turning the variac. This is through the whole adjustment range
> of the variac. The variac is a small one, maybe 5A don't know for
It will be intriquing to discover why your motor needs such a small
capacitor. Maybe one of the caps is different? A larger value cap
mixed in with the others? It will be interesting to see if anyone else
encounters a situation that requires such a small cap.